, Volume 120, Issue 2, pp 147–159

Relationships of bryophytes and lichens to environmental gradients in Maine peatlands

  • Dennis S. Anderson
  • Ronald B. Davis
  • Jan A. Janssens

DOI: 10.1007/BF00034344

Cite this article as:
Anderson, D.S., Davis, R.B. & Janssens, J.A. Vegetatio (1995) 120: 147. doi:10.1007/BF00034344


The most important environmental gradients of Maine peatlands are geologic substrate and alkalinity. Other gradients are coastal-inland climate, moisture content of the peat, P and K concentrations, and shade. Abundance weighted means of pH, Ca, and moisture content of peat are given for the 48 most frequently occurring bryophyte and lichen species. A TWINSPAN differentiated twenty associations. Environments of the first four TWINSPAN dichotomies differed largely by pH and related variables, though Fe, %H2O, shade, microtopography, and degree of humification were also significant. A CCA with forward selection entered pH, P, Fe, Na, %H2O, shade, and a climate factor as the minimum number of variables which best account for the species variation. Bryophyte and lichen distributions are determined primarily by edaphic and hydrologic factors, which determine the kinds and amounts of mineral solutes in peat interstitial water. Two independent chemical gradients were identified: (1) the acidity-alkalinity gradient related to base cation concentrations, and (2) a gradient of Fe, Al, Mn, and Si related to shallowness of peat and inputs from granitic lithologies.

Key words

Bryophytes lichens Maine Multivariate analysis Peatlands Sphagnum 

Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • Dennis S. Anderson
    • 1
  • Ronald B. Davis
    • 1
    • 2
  • Jan A. Janssens
    • 3
  1. 1.Department of Plant Biology and PathologyUniversity of MaineOronoU.S.A.
  2. 2.Department of Plant Biology and Pathology, and Institute for Quaternary StudiesUniversity of MaineOronoU.S.A.
  3. 3.Department of EcologyUniversity of MinnesotaSt. PaulU.S.A.